Xueshan Technologies Inc., a subsidiary of publicly traded Quarterhill Inc. (f/k/a Wi-LAN Inc.), has filed its first litigation, suing Renesas Electronics (2:22-cv-00157) over the provision of various integrated circuits, MCUs, MPUs, semiconductors, and SoCs. Asserted in the new Eastern District of Texas complaint are four patents, one generally related to a “user interface display apparatus” that uses texture mapping, another to a “wake-up circuit module” in an electronic device, and the other two, to a “3D graphics accelerator”. One of those last two patents-in-suit has seen prior litigation, although not filed by Quarterhill.